Physics in Daily Life — Part 2: 40 MCQs with Explanations

The distance between the optical centre of a convex lens and its principal focus is called its Focal Length .

A convex mirror always Forms a virtual image .

Cylindrical Lens is the correct answer to “Which among the following types of lenses are prescribed by doctors for a patient suffering from astigmatism”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Selenium is the correct answer to “Which one of the following non-metals is not a poor conductor of electricity”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Sound travels in air at an average speed of nearly 755 miles per hour .

Frequency is the correct answer to “When sound waves travel from air to water which of the following quantities remains unchanged”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Silver is the correct answer to “Which metal is pure conductor of electricity”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The process of splitting water molecules in the presence of light energy is called Photolysis .

Tyndall effect is related to the Scattering of light.

Internal friction of fluid is called Viscosity .

Einstein is the correct answer to “Who said that light is made of corpuscles/particles”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

speed of sound in dry air at 20 °C is 343 m/s .

Sound travels about 4 times faster in water than in air.

The lenses are used for the correction of: Both A & B .

A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as Cataract .

Ionosphere is the correct answer to “Which layer of the atmosphere reflects radio waves back to the earth’s surface”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Concave mirror is the correct answer to “Dental mirror is what type of a mirror”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

According to quantum theory of light, photons are Energy packets .

The lens used in a simple microscope is Convex .

The light a cat’s eyes gave off on a fence is the correct answer to “What inspired reflecting road lights to be invented”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Sound can’t travel through vacuum is the correct answer to “Which statement about sound is true”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Red, Green, Blue is the correct answer to “What are the primary colors of Light”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

5000 hertz is the correct answer to “The sounds of which frequency are human beings most sensitive”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Ole Roemer is the correct answer to “Who first measured the velocity of light”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Concave is the correct answer to “Which lenses are used by people having short-sightedness”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Pyrex glass is the correct answer to “Which variety of glass is heat resistant”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Sound travels Fastest in solid materials then liquid.

In the electricity meter the digit to the extreme right is 1/10th of the unit .

Units of electricity consumed by 2500 watt air-conditioner in one hour are 25 units .

According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in 10 hours .

Bioluminescence is the correct answer to “Which term describes the emission of light by a living organism”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Echo is a Reflection of sound.

The Mirror used in the Automobiles are Convex .

The Scientist who told “Heat is a form of Energy” was Joule .

The hard, solid rocks, whose composition or texture has been changed by heat or pressure in the Earth are called Metamorphic rocks .

Microphone converts sound energy into Electrical signals .

A loudspeaker changes Electrical energy into sound energy.

The speed of light with the rise in the temperature of the medium Remain the same .

According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in 10 hours .

Wood is the correct answer to “Which is least Conductor of Electricity among the following”. Items of this type are drawn from the Physics in Daily Life — Part 2 syllabus of Pakistani competitive exams, where the fact is tested verbatim.